TomTom restaurant is almost open for business — almost two years after Lisa Vanderpump approached Tom Schwartz and Tom Sandoval with the business venture at Schwartz’s August 2016 wedding to Katie Maloney.

Sandoval, 35, and Schwartz, 35, later invested $50,000 each for a 5 percent stake in the restaurant, captured during a Season 6 episode of “Vanderpump Rules.”

The restaurant had its “soft opening” on Wednesday night, an insider told Page Six on Thursday. The “official open is in about three weeks.”

The cameras were rolling during the party, and the entire “Vanderpump Rules” cast — and Lance Bass — were in attendance, the insider said.

“Ken [Todd] and Lisa were there all night and seemed super happy,” the insider said. “Jiggy was in tow and [their daughter] Pandora [Sabo] was kind of running things, it seemed.”

“James [Kennedy] was DJing. There’s a cool DJ booth in the main room. It’s like industrial chic style. There’s a big open patio in the back.”

“Tom and Tom were really proud, like it has all come full circle,” the insider said of the night’s festivities.